The James Webb Space Telescope (JWST) observations have been demonstrated to be efficient in detecting globular clusters’ (GCs) multiple stellar populations in the low-mass regime of M dwarfs.
Brown Dwarfs
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Atmospheric Methane Found On Brown Dwarfs W1935 And W2220
Astronomers used the NASA/ESA/CSA James Webb Space Telescope to study 12 cold brown dwarfs. Two of them – W1935 and W2220 – appeared to be near twins of each other […]
Posted inAI - Data - Apps - Cybernetics, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
FlopPITy: Enabling Self-consistent Exoplanet Atmospheric Retrievals With Machine Learning
Interpreting the observations of exoplanet atmospheres to constrain physical and chemical properties is typically done using Bayesian retrieval techniques.
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Presence Of Methane Suggests Brown Dwarf Atmospheric Heating By Auroral Processes
Astronomers using NASA’s James Webb Space Telescope have found a brown dwarf (an object more massive than Jupiter but smaller than a star) that may display possible aurorae, like the […]
Posted inAtmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Hubble Observes The Atmosphere Of Exoplanet WASP-121 b Changing Over 3 Years
The Jupiter-sized planet WASP-121 b is no place to call home. For starters, it orbits very close to a star that is brighter and hotter than the Sun. The planet […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Jupiter, Press Release
Comparative Exolanetology: Jupiter Targeted By VLT/ESPRESSO Exoplanet Hunter
For the first time, an instrument to find planets light years away was used on an object in the Solar System, in a study on Jupiter’s winds.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Webb Identifies The Smallest Free-Floating Brown Dwarf Yet Observed
Brown dwarfs are objects that straddle the dividing line between stars and planets. They form like stars, growing dense enough to collapse under their own gravity, but they never become […]
Posted inAstrochemistry, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The Carbon-to-Oxygen Ratio in Cool Brown Dwarfs and Giant Exoplanets. I. The Benchmark Late-T dwarfs GJ 570D, HD 3651B and Ross 458C
Measurements of the C/O ratio in brown dwarfs are lacking, in part due to past models adopting solar C/O only. We have expanded the ATMO 2020 atmosphere model grid to […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Status Report
Dynamically Coupled Kinetic Chemistry In Brown Dwarf Atmospheres — II. Cloud And Chemistry Connections In Directly Imaged Sub-Jupiter Exoplanets
With JWST slated to gain high fidelity time dependent data on brown dwarf atmospheres, it is highly anticipated to do the same for directly imaged, sub-Jupiter exoplanets.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Imaging & Spectroscopy, Status Report
JWST/NIRSpec Observations Of The Coldest Known Brown Dwarf
We present 1-5um spectroscopy of the coldest known brown dwarf, WISE J085510.83-071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST).